EP1819063B1 - Device and methods for duplex operation - Google Patents

Device and methods for duplex operation Download PDF

Info

Publication number
EP1819063B1
EP1819063B1 EP07108592A EP07108592A EP1819063B1 EP 1819063 B1 EP1819063 B1 EP 1819063B1 EP 07108592 A EP07108592 A EP 07108592A EP 07108592 A EP07108592 A EP 07108592A EP 1819063 B1 EP1819063 B1 EP 1819063B1
Authority
EP
European Patent Office
Prior art keywords
frame
subframe
uplink
downlink
addresses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP07108592A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1819063A1 (en
Inventor
Kalle Ahmavaara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Mobility LLC
Original Assignee
Motorola Mobility LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8547388&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1819063(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Motorola Mobility LLC filed Critical Motorola Mobility LLC
Publication of EP1819063A1 publication Critical patent/EP1819063A1/en
Application granted granted Critical
Publication of EP1819063B1 publication Critical patent/EP1819063B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the invention relates to radio systems and particularly to the effective processing of interactive traffic in a radio band.
  • a frequency band reserved for a radio system is allocated to users as radio channels in accordance with the selected multiple access technique (Multiple Access).
  • a radio channel is a frequency band employed in a radio connection or a portion of the frequency band separated for example by means of time or a user-specific code.
  • radio channels are usually frequency channels, whereby a dedicated frequency band is reserved for each radio connection, the frequency band being a part of the frequency resource in the system.
  • This technique is called frequency division multiple access (FDMA).
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • CDMA Code division multiple access
  • CDMA is a multiple access technique implemented by means of a spread spectrum technique wherein radio transmissions employing the same frequency band are coded in such a way that signals for a particular receiver party can be received only at particular receivers.
  • a radio system based telecommunication connection can be a simplex or a duplex connection.
  • the simplex connection is a telecommunication connection wherein the user can only either transmit or receive information simultaneously.
  • the duplex connection is a telecommunication connection wherein the user can transmit and receive information simultaneously.
  • a semiduplex connection is a combination of the two aforementioned connections, i.e. a telecommunication connection wherein one party employs the simplex connection and the other party employs the duplex connection.
  • the duplex connection is often implemented by employing different transmission and reception frequencies (frequency division duplex, FDD).
  • FDD frequency division duplex
  • the difference between the transmission frequency and the reception frequency is called a duplex spacing.
  • Most digital mobile communication systems such as the GSM (Global System for Mobile Communications) and DCS-1800 (Digital Cellular System for 188 MHz) are based upon time division multiple access (TDMA) implemented by a FDD telecommunication connection.
  • TDMA time division multiple access
  • New PCS Personal Communication System
  • CDMA Code division multiple access
  • TDD time division duplex
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • Document GB 2281470 discloses a communication system providing a signalling channel for assigning Access Grant slots in subsequent uplink slots.
  • a channel from the mobile station to the base station is called an uplink transmission path and, correspondingly, a channel from the base station to the mobile station is called a downlink transmission path.
  • a radio connection is based on successive data frames, the data frames being constructed according to the selected multiple access technique of for example adjacent frequency bands and time periods.
  • the part of the frame which can be unambiguously referred to by means of selected parameters (such as a frame frequency band, a time slot number or a code) is called a frame address.
  • a radio channel is hereinafter taken to mean a data transmission implemented in adjacent frames in one or several determined frame addresses. The properties of the radio channel communication can be affected by allocating the frame addresses. By establishing a radio channel composed of several frame addresses, more data transmission capacity will be obtained for example for the data transmission.
  • An interactive data transmission is a duplex communication where messages in the uplink and downlink transmission paths interact with each other.
  • An example is given here illustrating a channel allocation between the mobile station and the base station.
  • the uplink transmission path is hereinafter referred to as the uplink and the downlink transmission path is referred to as the downlink.
  • the base station informs about free addresses in a message transmitted on a Y channel (Yell) in the downlink direction.
  • a mobile station desiring to establish a connection transmits a random access (RA) message in the uplink direction on a channel selected among the channels indicated to be free by the Y channel, the RA message including the desire to establish a connection.
  • RA random access
  • the RA message is responded by an access grant (AG) message in the downlink direction, the AG message informing the mobile station about the frame address or frame addresses to be employed in the radio channel to be established.
  • AG access grant
  • the above described message transmission is accomplished without problems when traffic intensity is low enough, the downlink messages having enough time to react with the previous uplink messages by means of the suitable selection of the frame addresses.
  • the frame becomes full with the increase of traffic, whereby the messages relating to the interactive connection are located within the entire frame matrix and all the message addresses cannot then be selected in a suitable way. Consequently, the downlink messages cannot always be positioned in such frame addresses wherein the messages would have enough time to react with the messages submitted in the previous message in the uplink direction or, on the other hand, where there would be enough time to transmit information useful for all the subsequent frames in the uplink direction.
  • the use of the channel resources in this way is ineffective and radio spectrum is wasted in the implementation of the interactive connection.
  • a similar problem is faced for example with the data transmission originating from the mobile station in connection with acknowledgement messages.
  • a number of frame addresses is allocated to a subscriber for the data transmission.
  • the base station sends an acknowledgement message (for example automatic repeat request, ARQ) to the mobile station, the subscriber using the message for detecting whether the data transmission was successful. If the system disconnects the connection immediately after the data transmission and, after disconnecting the connection, receives a message of the data transmission failure, the connection must be re-established. If the system maintains the connection until the positive acknowledgement, an extensive channel allocation must be maintained unnecessarily in connection with the positive acknowledgement, i.e. capacity is wasted in the implementation of the interactive message transmission.
  • ARQ automatic repeat request
  • the object of the present invention is to introduce a method which provides a simple way to avoid the above described problem relating to the use of the channel resource in the implementation of an interactive telecommunication connection.
  • the FDD telecommunication connection is improved by providing the connection with two or more TDD dimensions.
  • the general approach of the invention is that the full-duplex frequency band is time-duplexed into two or more sub-bands with a substantially independent interactive communication. Transmissions in different transmission directions in each sub-band occur at different times but a simultaneous transmission in two different sub-bands can occur in different transmission directions. It is an advantage of the invention in the interactive communication that the message is received entirely in one transmission direction before the response is required in a particular sub-band in another transmission direction. On the other hand, the frequency band is utilized for traffic effectively, since it is possible to transmit simultaneously in different sub-bands in reverse transmission directions.
  • one FDD frame hereinafter referred to as a superframe, is composed of at least two subframes that are time-duplexed with respect to the corresponding subframes in the reverse transmission direction.
  • Interactive connection messages are formed on the basis of the previous subframe message or subframe messages in the reverse transmission direction.
  • the allocation of free channels in the downlink direction in association with the channel allocation is based upon the information within the entire previous uplink frame.
  • the frame addresses detected to be free on the basis of the previous uplink subframe are informed in the downlink subframe by means of virtual time-duplexing according to the invention.
  • the system has then enough time to take into account all the random access messages from the previous uplink subframe and to inform about the free channels on the basis of this information in the next corresponding downlink subframe.
  • a Y channel message in the downlink direction cannot respond to all the uplink frame messages, whereby the corresponding allocation message can be delayed by at least one frame.
  • Figure 1 illustrates a radio interface based on data frames and traffic channel allocation in a frame system.
  • a y-direction drawn in Figure 1 shows frequency differentiation, i.e. each overlapping y level (y1, y2, y3) illustrates one frequency segment.
  • an x-direction drawn in Figure 1 shows time differentiation, i.e. each adjacent x level (x1, x2, x3, x4) illustrates one time slot.
  • a radio channel can be unambiguously identified by an address (for example x3, y2) addressing one rectangle in a frame shown in Figure 1 .
  • a channel is composed of information transmitted in a determined frame address of one frame or successive frames (F1, F2, F3, F4).
  • the frame in Figure 1 shows a data frame associated with a substantially one transmission direction.
  • a reverse transmission direction is composed of a structurally identical frame in another frequency segment.
  • Figure 2 illustrates channel arrangement for one frequency band (one layer in the y-direction in Figure 1 ) in the uplink and downlink directions (UL and DL respectively).
  • a duplex frequency spacing (dF) exists between the UL band separated from the uplink frame and the DL band separated from the downlink frame and, in prior art solutions, the downlink frames have been delayed by some time slots (dT) compared with the uplink frames.
  • dT time slots
  • the duplex spacing is 45 MHz and the numbering of downlink frame time slots is delayed by three time slots compared with the uplink frames.
  • An interactive radio connection is a duplex data transmission where a message submitted in one transmission direction affects the corresponding message transmitted in the reverse transmission direction.
  • Signalling of a mobile station and a base station during the channel allocation and different types of acknowledgement messages in the data transmission are given as examples of interactive connections.
  • a channel is not reserved subscriber-specifically for the whole session (for example a call), but the channel is allocated to the subscriber for the time periods during which there is an actual need for the data transmission (for example speech or data transmission). In that case, channel allocation takes place before each data transmission transaction.
  • An interactive radio connection is illustrated in Figure 2 by a circle in a UL frame representing an interactive message and by a triangle in a DL frame representing the corresponding message.
  • the interactive data transmission is composed of successive circles and triangles, the circle being a response to the triangle, the triangle being a response to the circle etc.
  • the interactive message transmission is successful by means of an appropriate selection of frame addresses, and the interactive message can be established in both transmission directions on the basis of the received messages.
  • the frame begins to fill up because of the increasing communication or a greater amount of time slots reserved for the subscriber, the situation becomes more complicated.
  • Figure 3 illustrates a situation where the interactive message in the downlink direction (marked with a triangle) shown in Figure 2 is composed on the basis of the messages submitted in the entire uplink frame.
  • a situation exists for example in connection with an access grant (AG) message given in said DL frame.
  • the base station informs about free addresses in a Y channel message in the downlink direction.
  • a mobile station desiring to establish a connection in the uplink direction selects a channel which has been informed to be free and sends a random access (RA) message in the uplink direction on said channel informing in the message about its desire to establish a connection.
  • the random access message is responded by the access grant (AG) message in the downlink direction informing the mobile station about the frame address or the frame addresses to be used on the radio channel to be established.
  • AG access grant
  • the frame will become full with the increase of communication, i.e. messages associated with the interactive connection are located within the entire frame matrix. Consequently, the downlink messages have no time to react with the uplink messages submitted in the previous message, and, on the other hand, they have no time to transmit the information to be utilized in the uplink frame. Using the channel resources in such a way is ineffective and radio spectrum is wasted in the establishment of the interactive connection.
  • FIG. 4 illustrates a first embodiment of the invention wherein a radio connection is based upon uplink and downlink superframes.
  • Each superframe consists of 24 separate frame addresses being divided into two subframes f1 and f2 which both comprise 12 frame addresses.
  • the transmission of the UL and DL superframes is timed in such a way that the transmission occurs simultaneously, i.e. the delay between different transmission directions is zero.
  • the subframes uf1/df2 and uf2/df1 in the superframes usf and dfs are time-duplexed in such a way that the subframe transmissions occur at different times.
  • free channels for the subframe uf2 of the UL superframe UF1 are notified on the Y channel of the subframe df1 in the DL superframe DF1 and, correspondingly, free channels for the next subframe uf1 of the UL superframe UF2 are notified on the Y channel of the subframe df2 in the DL superframe DF1.
  • a mobile station listens to the Y channel in the subframe df1 of the DL superframe DF1.
  • the mobile station selects a free channel submitted on the Y channel, such as CH1, and sends a random access (RA) message on the free channel CH1 being selected in the subframe uf2 of the UL superframe UF1.
  • a base station responds by an access grant (AG) message in the subframe df1 of the DL superframe DF2.
  • the AG message informs the mobile station that the channel CH1 (marked in Figure 4 with a black square) has been reserved for it from the next subframe.
  • the mobile station starts transmitting on the channel CH1 in the subframe uf2 of the UL superframe UF2.
  • CH1 Since CH1 is now allocated to said mobile station, it is no longer announced through the Y channel in the subframe df1 of the DL superframe DF2.
  • the channel allocation takes place by means of the subframe pair df1 and df2.
  • a similar separate channel allocation can occur simultaneously (but in reverse phase) by means of another subframe pair df2 and uf1. It is possible that the same mobile station participates in the channel allocation in both subframe pairs.
  • Interactive acknowledgement messages occur in each subframe of a superframe, preferably in the middle of the subframe, whereby the system has enough time to react with the messages.
  • Traffic channels (such as CH1) occur only once in one superframe, i.e. in the present example only in the subframe uf2.
  • two connection layers are formed in the frame structure for the interactive messages, one of which is composed of the subframe uf1 of the UL superframes and the subframe df2 of the DL superframes, and correspondingly, the other is composed of the subframe uf2 of the UL superframes and the subframe df1 of the DL superframes.
  • Figure 5 illustrates the connection layers which are formed in the frame structure.
  • solid arrows illustrate interactive communication at a connection level df1-uf2
  • dashed arrows illustrate communication at a connection level df2-uf1. It is possible that the same mobile station participates in communication at both connection levels.
  • the allocation situation for each UL subframe is already known in the previous DL subframe and the interactive message concerning each frame address can be transmitted before the next transmission of the frame address in the superframe.
  • the AG message relating to the RA message submitted in the channel CH1 in the subframe of the superframe UF1 is already submitted in the subframe df1 of the superframe DF2, whereby communication on the channel CH1 can already start in the subframe uf2 of the superframe UF2, the subframe uf2 being the frame wherein the channel CH1 occurs next.
  • Time-duplexing the connection layer ensures that the information submitted on the Y channel always contains exact information about the free channels in the next subframe.
  • one AG message in the downlink direction can be employed for responding to all the RA messages at the same connection layer and the AG message can be transmitted to the mobile station before the allocated frame address or allocated frame addresses occur next time in the superframe.
  • the example is illustrated in Figure 6 .
  • a channel CH2 composed of two UL-frame frame addresses has been reserved for a subscriber for the data transmission.
  • the connection is maintained and the mobile station waits for an ARQ acknowledgement message from the base station.
  • the base station gives the acknowledgement message in the subframe df1 of a DL superframe DF2 and at the same time informs in a Y message that the frame addresses allocated to the channel CH2 are free.
  • the base station sends a message informing about a transmission failure in the subframe df1 of the superframe DF2, whereby the mobile station can continue transmission on the channel CH2.
  • interactive information can be transmitted before the actual traffic channels occur next time in the superframe.
  • Interactive acknowledgement messages are preferably placed in the middle of the frame, whereby the system is given enough time to react with the information submitted in the previous subframe. If more time is needed in the processing of the messages in the UL and DL directions, as is the case in the systems based on CDMA multiple access technique where the duration of the message comprises the entire frame cycle, the superframe can be composed of more than one subframes.
  • Figure 7 illustrates the solution of the invention in the case of three subframes (connection layers).
  • the first connection layer is composed of subframes uf1 and df2
  • the second connection layer is composed of subframes uf2 and df3
  • the third connection layer is composed of subframes uf3 and df1. Reaction time has been increased in the case presented in Figure 7 by delaying the uplink transmission with respect to the downlink transmission by half a frame cycle.
  • the principles of the invention can also be applied in the conventional time division duplex TDD where the signals in different directions are transmitted interleaved in time on the same transmission channel.
  • the frame in both directions can be composed of two or more subframes, the subframes in turn forming one or more connection layers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Radio Relay Systems (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
EP07108592A 1996-12-31 1997-12-30 Device and methods for duplex operation Expired - Lifetime EP1819063B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI965299A FI105371B (fi) 1996-12-31 1996-12-31 Radiojärjestelmä ja menetelmiä kaksisuuntaisen radioyhteyden muodostamiseksi
EP97950211A EP0956654B2 (en) 1996-12-31 1997-12-30 Radio system and method for duplex operation

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP97950211A Division EP0956654B2 (en) 1996-12-31 1997-12-30 Radio system and method for duplex operation
EP97950211.9 Division 1998-07-23

Publications (2)

Publication Number Publication Date
EP1819063A1 EP1819063A1 (en) 2007-08-15
EP1819063B1 true EP1819063B1 (en) 2012-10-31

Family

ID=8547388

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07108592A Expired - Lifetime EP1819063B1 (en) 1996-12-31 1997-12-30 Device and methods for duplex operation
EP97950211A Expired - Lifetime EP0956654B2 (en) 1996-12-31 1997-12-30 Radio system and method for duplex operation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP97950211A Expired - Lifetime EP0956654B2 (en) 1996-12-31 1997-12-30 Radio system and method for duplex operation

Country Status (9)

Country Link
US (3) US6747966B1 (fi)
EP (2) EP1819063B1 (fi)
JP (1) JP2001507896A (fi)
AT (1) ATE365999T1 (fi)
AU (1) AU5323898A (fi)
DE (1) DE69737868T3 (fi)
ES (1) ES2394221T3 (fi)
FI (1) FI105371B (fi)
WO (1) WO1998032236A1 (fi)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI104135B (fi) * 1997-06-24 1999-11-15 Nokia Mobile Phones Ltd Aikajakoiset monikäyttöradiojärjestelmät
FI110467B (fi) * 1997-08-19 2003-01-31 Nokia Corp Informaation siirto tietoliikennejärjestelmässä
RU2328827C2 (ru) 2002-08-13 2008-07-10 Конинклейке Филипс Электроникс Н.В. Система автоматического запроса повторной передачи (arq) со статусом и квитированием пакета
US6898414B2 (en) * 2002-10-28 2005-05-24 Motorola, Inc. Method for acknowledging messages in a communication system
GB2398455B (en) 2003-02-11 2007-09-26 Ipwireless Inc Method, base station and mobile station for TDD operation in a communication system
US9083436B2 (en) 2004-03-05 2015-07-14 Interdigital Technology Corporation Full duplex communication system using disjoint spectral blocks
EP2020089A4 (en) * 2006-04-28 2011-05-18 Mitsubishi Electric Res Lab METHOD AND SYSTEM FOR PROCESSING REFERENCE SIGNALS IN OFDM SYSTEMS USING TRANSMISSION TIME INTERVAL GROUPING
JP2008017341A (ja) 2006-07-07 2008-01-24 Ntt Docomo Inc 無線通信装置および無線通信方法
US8396013B2 (en) 2006-09-11 2013-03-12 Qualcomm Incorporated Method and apparatus for supporting half-duplex terminals in an asynchronous mode
JP4927946B2 (ja) * 2006-09-11 2012-05-09 クゥアルコム・インコーポレイテッド 非同期モードで半二重端末をサポートする方法及び装置
US7839824B2 (en) * 2007-07-31 2010-11-23 Beceem Communications Inc. Allocation of periodically distributed frames of wireless communication
EP3005809B1 (en) * 2013-05-27 2023-01-25 Taissa Research LLC Method for allocating resource for device for wireless communication and base station for same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281470A (en) * 1993-04-02 1995-03-01 Motorola Ltd Multichannel random access communications systems

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232562A (en) 1989-05-26 1990-12-12 Philips Electronic Associated Data transmission over a tdm duplex channel
US5229995A (en) 1990-07-17 1993-07-20 Northern Telecom Limited Radio link architecture for wireless communication systems
DE4036418A1 (de) * 1990-11-15 1992-05-21 Grundig Emv Funkgeraet fuer ein fdm-tdm-funkuebertragungssystem
US5193091A (en) 1990-12-12 1993-03-09 Motorola, Inc. Tdm communication system for a wide area site and a plurality of local sites
CA2110578C (en) 1991-06-03 1999-04-27 William Timothy Webb Qam system in which the constellation is modified in accordance with channel quality
US5450618A (en) 1992-04-30 1995-09-12 Motorola, Inc. Full duplex and half duplex communication unit with volume setting
EP0688446A1 (en) 1993-03-10 1995-12-27 National Semiconductor Corporation Radio frequency telecommunications transceiver
US5839071A (en) * 1993-09-21 1998-11-17 Telstra Corporation Limited Base station for a mobile telecommunications system
FI98427C (fi) 1994-06-08 1997-06-10 Nokia Mobile Phones Ltd Järjestelmäpakettidatan siirtämiseksi eri bittinopeuksilla TDMA-solukkojärjestelmässä
US5689502A (en) * 1995-06-05 1997-11-18 Omnipoint Corporation Efficient frequency division duplex communication system with interleaved format and timing adjustment control
CA2223321A1 (en) † 1995-06-05 1996-12-12 Omnipoint Corporation Timing adjustment control for efficient time division duplex communication
US5802046A (en) 1995-06-05 1998-09-01 Omnipoint Corporation Efficient time division duplex communication system with interleaved format and timing adjustment control
JP2765619B2 (ja) 1995-06-08 1998-06-18 日立電子株式会社 時分割複信無線機
SE504577C2 (sv) * 1996-02-16 1997-03-10 Ericsson Telefon Ab L M Metod och anordning för kanaltilldelning i ett radiokommunikationssystem
SE518132C2 (sv) * 1996-06-07 2002-08-27 Ericsson Telefon Ab L M Metod och anordning för synkronisering av kombinerade mottagare och sändare i ett cellulärt system
DE19640450C1 (de) 1996-09-30 1997-10-30 Siemens Ag Basisstation mit schneller Kanalwechselfunktion eines zellularen TDMA/FDMA-Funksystems, insbesondere eines zellularen DECT-Systems
EP0914013B1 (en) * 1997-10-17 2005-12-21 Nortel Matra Cellular Apparatus and method for frequency band scanning in a mobile communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281470A (en) * 1993-04-02 1995-03-01 Motorola Ltd Multichannel random access communications systems

Also Published As

Publication number Publication date
FI105371B (fi) 2000-07-31
AU5323898A (en) 1998-08-07
EP0956654A1 (en) 1999-11-17
FI965299A0 (fi) 1996-12-31
JP2001507896A (ja) 2001-06-12
EP1819063A1 (en) 2007-08-15
USRE44089E1 (en) 2013-03-19
ATE365999T1 (de) 2007-07-15
WO1998032236A1 (en) 1998-07-23
DE69737868T3 (de) 2013-05-16
DE69737868D1 (de) 2007-08-09
ES2394221T3 (es) 2013-01-23
FI965299A (fi) 1998-07-01
USRE41178E1 (en) 2010-03-30
DE69737868T2 (de) 2008-03-06
EP0956654B2 (en) 2010-08-11
EP0956654B1 (en) 2007-06-27
US6747966B1 (en) 2004-06-08

Similar Documents

Publication Publication Date Title
CA2135950C (en) Method of multiple access
US7907554B2 (en) Method of communication between mobile station and base station in mobile communication system
RU2209528C2 (ru) Канал связи с произвольным доступом для информационных служб
US5940763A (en) Enhanced preemption within a mobile telecommunications network
US6577618B2 (en) Packet control channel feedback support for contention and reservation based access
EP1062829B1 (en) Signalling configuration in a radio communication system
EP0720405A2 (en) Multiple access cellular communication with dynamic slot allocation and reduced co-channel interference
AU4711093A (en) Packet data transfer in a cellular radio system
EP1819063B1 (en) Device and methods for duplex operation
JP2003506965A (ja) 無線通信システム
US20030081577A1 (en) Fast message exchange method for a radio communication system
EP1121823B1 (en) Radio communication system
EP1074106B1 (en) Method of balancing availability of communication links in communication systems
US20120270510A1 (en) Radio communication system
JP3613384B2 (ja) 無線通信システム、無線チャネル割当方法及び無線中継装置
JP3284098B2 (ja) 無線アクセス方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 0956654

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL SE

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20080211

AKX Designation fees paid

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20100622

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MOTOROLA MOBILITY, INC.

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MOTOROLA MOBILITY LLC

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 0956654

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 582471

Country of ref document: AT

Kind code of ref document: T

Effective date: 20121115

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 69740500

Country of ref document: DE

Effective date: 20121227

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2394221

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20130123

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 582471

Country of ref document: AT

Kind code of ref document: T

Effective date: 20121031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

26N No opposition filed

Effective date: 20130801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121230

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121231

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 69740500

Country of ref document: DE

Effective date: 20130801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20121031

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151230

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20161226

Year of fee payment: 20

Ref country code: GB

Payment date: 20161228

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20161227

Year of fee payment: 20

Ref country code: ES

Payment date: 20161227

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20161229

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151230

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20161222

Year of fee payment: 20

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20170710

REG Reference to a national code

Ref country code: NL

Ref legal event code: PD

Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC; US

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: MOTOROLA MOBILITY LLC

Effective date: 20170626

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20170831 AND 20170906

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69740500

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20171229

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: GOOGLE TECHNOLOGY HOLDINGS LLC, US

Effective date: 20171214

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20171229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20171229

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20180508

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20171231

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230512